vw jetta cranking too long with warm engine

[trigger01]

I haven't been able to get the car to AutoZone to get the fault code since I can't keep it running. I did take it there the other week and it came up as "p1240: Cyl.4-Fuel Inj.Circ. Open Circ." I don't see how this could be the problem and I had a computer that wasn't the same part number as the one I took out (I have that fixed now) The car doesn't care if I'm turning or not, it'll just shut down.

[boschmann]

p1240 indicates an open circuit on #4 injector & would cause a miss, not quitting. Someone may have pulled the injector plug with the engine on or cranking & set that code. Have you tried the ECM power supply relay (position #3, top row third from left)? It's often a cause of symptoms like you describe & fairly cheap.

[vwjetta96]

Trigger01, I just heard a story that was almost 100% similar to yours. The owner of an acura complained that the engine would start then stall shortly after and couldn't go with his car anywhere. He got it towed to a shop. Then a technician looked at it and when the engine started he depressed the accelerator slightly while the car wasn't moving and the engine continued to run without any appareent problems. His technician suspected high RVP gasoline was the problem. The fuel vaporized in the fuel rail. Enough condensed fuel was available to start the engine but the fuel injectors are designed to handle liquid fuel -not vapor- so the engine stalled.

I don't know how the weather is in your area but if you still had winter gas in your tank change it! However, its a good thing to change it either way! If you didn't use it for a while the gas mite be bad, if the weather is warm or warmed up suddenly can cause vapor lock issue. Vapor lock is caused by bubbles that form in the fuel and bubbles can be caused by heat or by sharp blends too.

So either way Im standing by what I thought originally your car has fuel related problem in my opinion that mite has a way cheaper solution then some technician say. Like changing the gas in your car.

I really hope it won't be a bigger problem and you can use your car soon!

[trigger01]

Originally Posted by boschmann

p1240 indicates an open circuit on #4 injector & would cause a miss, not quitting. Someone may have pulled the injector plug with the engine on or cranking & set that code. Have you tried the ECM power supply relay (position #3, top row third from left)? It's often a cause of symptoms like you describe & fairly cheap.

I'm sorry, but what does this relate to? I don't know what position 3, top row third from left is. Is it the fuse panel under the dash or something else?

Originally Posted by vwjetta96

if you still had winter gas in your tank change it!

I live in San Antonio, TX and I've filled the tanks several times since this started happening. It may be a fuel problem, but I'm not sure that it's a vapor problem. For some reason (I took off the distributer cap and buffed the contacts, maybe that was it), this week I was able to drive it 45 miles with no problem. The next day I take it out again and it sputtered and the check engine light came on, but it didn't die and only lasted about 1 second and then the light went off and it drove fine till I got it home, which was about 10 miles. Do you think that if it were vapor it'd do that? I'm not really familiar with that problem. I'm thinking of changing the ignition coil to see if that helps.

[boschmann]

The fuse & relay panel is above the driver's feet. There are two rows of relays. The one I reccomend changing is the top row, third from the left. It will have a VW part # on it so you can get it from VW w/o too mch trouble & it's a cheap thing to try.

[trigger01]

Originally Posted by boschmann

The fuse & relay panel is above the driver's feet. There are two rows of relays. The one I reccomend changing is the top row, third from the left. It will have a VW part # on it so you can get it from VW w/o too mch trouble & it's a cheap thing to try.

Thanks, I'll check it out. Here's the newest: I got the car to the dealership (after stalling about a half mile away and having to push it up a slight incline almost the whole way). They rechecked it and now they think that it is an engine speed sensor. Does this sound feasable?

[boschmann]

Yes, but I believe it would be shutting down the ignition & you would not have spark.

[trigger01]

Originally Posted by boschmann

Yes, but I believe it would be shutting down the ignition & you would not have spark.

Thank you. I'll let you know.

[vwjetta96]

I live in San Antonio, TX and I've filled the tanks several times since this started happening. It may be a fuel problem, but I'm not sure that it's a vapor problem. For some reason (I took off the distributer cap and buffed the contacts, maybe that was it), this week I was able to drive it 45 miles with no problem. The next day I take it out again and it sputtered and the check engine light came on, but it didn't die and only lasted about 1 second and then the light went off and it drove fine till I got it home, which was about 10 miles. Do you think that if it were vapor it'd do that? I'm not really familiar with that problem. I'm thinking of changing the ignition coil to see if that helps.[/quote]

The only things I know about the vapor lock is what I wrote. I do think its a possibility that this could be the problem because if you live at a warm place the gas can evaporate faster and it can get into places where liquid gas should go. I wish I could be a further help about that but if I find anything else out about that ill let you know.

I am very curious about the ignition coil because I was suggested to do that too. ( refer to i think page 1 of this thread) But i have little doubts as I had a tune up and I think they might have changed that and the problem did not start then or before.

[vwjetta96]

sorry my last reply is not too visible because it got mixed with yours but its still there

[trigger01]

I found the problem, it was the engine speed sensor. Cost $140 installed and the problem was fixed. Thanks for your suggestions and good luck with yours...

[vwjetta96]

Originally Posted by trigger01

I found the problem, it was the engine speed sensor. Cost $140 installed and the problem was fixed. Thanks for your suggestions and good luck with yours...

Thank you for posting the problem, and im glad your car is fixed. Actually i just started a new thread to update this one, because I just got my car too. And now I envy you hehe. Here are the problemSSS with my car, I scanned it.
Here are the codes that I've got:
1.) throttle actuator malfunction
2.) cam position sensor performance
3.) electronic coolent temprature circuit high
4.) main TWC efficiency
5.) long term fuel trim to lean
6.) O2 circuit

So instead of the good luck I think ill need either lots of money to fix or to buy a new car. Unless there is a miracle
Good luck to you too!